New Wave Enviro Products - Under Counter Water Conversion Kit The New Wave Enviro 10 Stage Under Sink Water Filtration System Kit will allow you to mount the filter under your sink -- comes with housing, vented faucet, 10 and all necessary hardware. To set up your 10 Stage Water filter under your sink, you'll need this conversion kit and a 10 Stage water filter cartridge. You will need an extra hole in your sink for the faucet. They recommend that a licensed plumber install this kit; self